QUOTE(danny_sp15 @ Feb 28 2015, 01:22 AM)
Well it is being exposed to sunlight directly, cos it's on the balcony.

I wanted to move it indoors but we dont have the space. I added a pair of algae eaters a few weeks ago, but it doesnt seem to help.
The previous water cabbage dies off easily. The new one I bought (different type, not sure what is it called) seems to be sturdier, though it doesnt really propagate.
Starting a small aquarium to separate the males cos I dont want any more fry. The pond is overcrowded as it is.

A small bedside table to put the aquarium

20 mins assembly + really sore hands.

Small aquarium with black gravel. Personally I like white better, but worried it might look dirty easily.
on your pond, you can get some otto, but not sure if they can survive outside at the balcony with rain and sun etc.
but for your small tank, it is always advisable to have a bare tank to keep guppies, especially if you are keeping pure strain.
it's okay if you wanna put the black gravel, are they sharp? the black sand i mean, are they smooth? i might afraid it might cut the guppies, they might injured themselves. if it's smooth, you can always add cory doras (some ppl doesn't agree), but you can also put apple snail. they can take care of the left over food for you.